Re: [PATCH 06/12] xen/common: add cache coloring allocator for domains

[Julien Grall <julien@xxxxxxx>]

Hi,

On 17/10/2022 08:06, Michal Orzel wrote:
> On 26/08/2022 14:51, Carlo Nonato wrote:
> Apart from that, the memory coming from the buddy is of any color. Shouldn't it 
> be that the memory
> allocated for domains comes from colored memory of the colors assigned to them 
> and anything else
> should come from colors given to Xen? At the moment, the memory for e.g. 
> allocating P2M tables comes
> from the buddy which means it can be of any color and might cause some cache 
> interference.
Somewhat related. IIUC what you are saying, the P2M pool will still be 
allocated from the buddy. I would expect we want to instead allocate the 
P2M pool from the same color as the domain to prevent interference when 
the TLBs are loaded. Or is the interference negligible?
Cheers,

--
Julien Grall